Extensible support.



P. 0. BURNS.

EXTENSIBLE SUPPORT.

APPLICATION FILED MAY8,1913.

1,109,038, Patented Sept. 1, 1914 UNITED STATES PATEET QFHCEc PETER C. BURNS, OF CHICAGO, ILLINGI, ASSIGNOE TO THE AMERICAN E L .YdrG'JTEtIS COMPANY, OFGHIGAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

ElE'lENSIBLE SUPPORT.

To all whom it may concern Be it known that I, PETER C. BURNS, a citizen of the United States of America, and resident of Chicago, Cook county, Illinois, have invented a certain new and useful Improvement in Extensible Sup? ports, of which the following is a specifi cation. v

My invention relates to improvements in extensible supports such as are employed for supporting telephone sets, lights or mirrors, etc. In bracket supports of this character as heretofore devised, it has been found diflicult to providea bracket which not only can be extended in a horizontal plane, but also can be extended at an up wardly inclined angle, to thus vary ,vhq height at which the telephone set, for exi ample, is supported. I

The object of my invention is to pro; vide' an extensible bracket which can be extended in ahorizontal plane in the ordif nary manner, and can also be raised so as to extend upwardly, and then be auto; matically locked in this raised position and cannot be unlocked until the bracket has been collapsed 0r contracted to a predeter mined point. k I

A further object of my invention is to provide a yielding stop to take away the sudden jar occasioned by the sudden c0l switc hook.

series of links 7 8, pivoted together to form portion of this stud 22 engages with the tip lapsing of the bracket from its raised position.

It is further found that when supports of this character are clamped on to the tubular telephone stand that. they are apt to slide upwardly and thus come in contact with the telephone switch hook and liftthis hook. To prevent this, I provide an arm which engages beneath the head of the telephone stand to prevent the clamp from risin to such an extent as to effect the These and other objects of my invention wilLbe more readily understood by having reference to the accompanying drawings; in which- Figure 1 represents a side elevation of my improved bracket, showing this-bracket in extended form. Fig. 2 is a similar View showing the bracket contracted and supporting a telephone stand. Figs. 3, 4 and 5 are detail views.

My improved bracket consists of two Specification 0!" Letters Patent.

Patented sept; ifiid;

hpplicatidn filed m a, 191v- Serial No. 766,277.

a well known lazy tongs, the construc ion being such that these linkscan he extender or contracted in the well known manner: The outer end of the series of links 7 is pivotally connected to the clamp 9 mounter. on the rod 10, while the inner end of series of links is connected to the clamp 11 mounted on the supporting rod 12. The rod 10 carries the clamp 13 which is adaptedto clamp the tubular telephone support is in the manner clearly shown in Fig.

Garried by this clamp 13 is an upwardly 'ext'ending'finger 13 which is adapted to engage beneath the headingon the telephone set 14, in the manner clearly indi- Gated, to prevent-this clamp from"sliding upward and thus engaging the switch hook (not shown).

The outer end of the series of links 8,

instead of being connected directly to the clamp 15 on the rod 10, is connected to this clain through a 'pivotedzlcver 16, this construction being such that the clamp 15' can be made rigid with the rod 10, as this pivoted lever connection obviates the neces sity-of a sliding hearing. The inner end 7 of this series of links 8 is likewise pivotally connected with the clamp 17. This pivotal connection consists of the arm 18 provided with a slot 19. This slot is provided with an enlarged upwardly curved end portion .20, and the lower side "21 of the arm. is

likewise bent inward slightly, so as to form a spring or yielding stop in the manner which Will hereinafter be more fully set forth. Rigidly mounted on the link 8 a stud 22. which stud engages within the slot-19 0f the arm 18. This stud has a flattened face 23. v the bracket is in closed' position u ind cated in Fig. 2, the stud 22 18 at the inner end 0; the slot 19, and the bracket ca then be extended or contracted in a horiy n tal plane, as indicated in dotted lines in g. 1, without the stud moving any appreciable distance within the slot 19. When it is de-' sired however to-su )oort the tele hone in .the raised position shown in full lines in *ig. 1, it is merely necessary to draw upwardly on the-stand 14, and the stud slides along the slot 19 permitting the lower end of the inner link 8 to draw away from. the supporting rod 12. When. the stud has reached the end of thesiot 19., the cm ed ride I 7 end poitioo. of this ct, the clearly shown in Fl 4:, toe ll 1 dropping downward by gravity to engage til: stud in this manner. The breclzet is thus securely locked in raised posltion-thct is, the bracketcannot swing downward, as the engagement of the stud 22 in the end of the slot 19 forms a rigid zmrmcction between the link 8 and the supporting rod 12-. \Vben the bracket is col: lapsed, the angle of the inner link 8 varies, as this link pivots around its pivotal point of connection with the corresponding link 7, and thus the eagle of this link varies .with reepec't to the arm 18. When the bracket is in extended position, the inner link 8 is in substantially the angular position shown in Fig. 3, while when the bracket has been contzrectcd this link is in substantially the posilion shown lo Fig, 2, The stud 22 being in tegrel with. this link likewise, therefore, to i l re o t to the arm 18 As the stud cote with respect to this arm, the curved portion of the stud gradually moves out of engagement with the enlarged end portion 0, end when the flat face has.

been brought into the position indicated in Fig. 4l, it will be seen that the stud is free to move downward along this slot. The point etwvbicb. this release occurs is preferably adjusted so that this downward movement does not occur until the bracket has been moved to substantially its closed positlon, its tlzc stud moves along the slot, this movementrctai'ded on account oli'tbe arm which, being bent inward, causes fricit between the sides of the top, and in this manner any be seen that l have devised ii of lfl'z dict, in an be extended or com lit :mgles to the sup- 1 be cxtcna'lcd at an weeps belo promg the port c, and to mltcmaticelly ilk? support has been 0, the spring 211111121 cans for preventing it through the careless bracket.

illustrated and described nbodirnent of any invention,

, be 'tmderstood that I do ted to the exact construe as various modi- 1; themselves to said support, means for permitting said support being extended an upwerdl" inclined eagle, means for automatically ocking the extended support in this raised position, and means for automatically releasing this locking means when the support is contracted.

2. In a device of the class described, a support, lazy-tongs pivotally connected to said support, adapted to be extended and contracted in a horizontal plane, means for permitting said lazy tongs to be extended to an upwardly inclined an le, and means for eutomaticall locking said lazy-tongs in said extended on raised position so as to prevent them from'swingin downward.

3. In a device the class described, a support, lazy-tongs pivotally connected to said support, adapted to be extended and contracted in a horizontal plane, means for permitting said lazytongs to be extended to on upwardly inclined angle, means for automatically locking said lazy-tongs in said extended and raised position so as to prevent them from swinging downward, and means for releasing said locking means by the movement of said lazy-tongs as they ei e brought into closed position.

4, In a device of the class described, a support, an extensible bracket secured to said support and adapted to be extended and cpntmcted in a plane at right angles to said support, means for permitting said bracket being extended at an upwardly inclined angle', means for automatically locking the extended bracket in this raised position, means for automatically releasing this locklog means when the bracket is contracted, and means for then retarding the downward movement of sold bracket.

5. In a device of the class described, lazy tongs, a support, pivotal connections at one point between said support and said lacy tongs, adjustable connections at a second point, said adjustable connections compris-' log a slotted arm pivotellv connected to seld support, it stud carried 3; said lazy-tongs cud engaging said slot, said connection per- Tug sold lezyttmgs to be raised into e2;- tcnded position, an enlarged end poetic/n on said slot adopted to be engaged by e-aid stud for locking said tongs in this relscd position, and means for automatically releasing said stud from said enlarged end portion of said slot when said lazy-tongs are contrzuzted.

6. In a device of the class described, lazy tongs, a support, pivotal connections z tone point between said support and said lazytongs and adjustable connections at a: so:- oud point, said adjustable oounections comprisin-q a slotted arm pivotelly concocted to said support, and a stud curricdby said luz ,'-tonp;s and sing sold slot,ssid conb1. said to oclit 1, malaise raisw'i in}; iififillllfiiil *iitini), all unlzirgcli and p01" )1 1111 said :5 u; adapted (0 lm engaged by mid {mi for locking will lungs in this misoi {)Oblialijl'fi Sglll'l stud being pm videcl. with a flat :fairg w permiti-v id stud m be mile fl'lllll (Kliillg-l end pun tion of Lil; slot 'wlwii said lazyiziii are C(Hll Ftwtflll 7. In ii device 0f the usle d-esvribwi a supp-girl, an m; Qzisiblc lnzmlwl, uni to said supportiiiiai udapwal to be Lxtendml and 'LQllfl'li'Lxi in a plane at ri fii'f, angles to said my imam pllfilllllllg said sum'inrt be anded 44' an up (2'31. clinml mig mums fflr 2!.lwfllildllikliiy locking the cxmiulml support in this 1f;ii:5((l p0- sition, means fur autm'natiually releasing this kicking means when the support is colitmcleul and means fur 'ii'lQIl ictuilling the downward niiweimiii uf saziiil bracket.

8. In a dovice of the class described, lazytongs, a support, pivotal connections at one point between said support and said lazytongs, adjustable connections at a second point, said adjustable connections comprising a SlOtEQli arm piv'uially conneclecl to said support, a Sillil carried by said lazy-tongs and engaging saidv slut, said wnneclion p1rmitt/lug said lazy-longs to be wiReii into extended position, an wilm'gml end pnr linii 021 said slot ruliiptuil to be engaged by said stud for lnvlaing said tong-1% in this raised p0silion and means W auwlnrilimlly releasing said stud frmii iii (,Ulll' fil nd poi-(inn if said slut Will?!) will lazy 231? (:(mlinuled, said r-alul wing; pmvi: side engnQ. Ward mmwii 5). In ii, rim was ill the M m ibed, lazytongs, a siip wi' pivotal cuns'isatiu at (me point between :illfii supprirt aml said lazy-- tongs and my table. connections at a sec- 0nd paint, said fil lllsiilll iib cuimeciions c0inp051 v NATO released mm lilt in! the S10}; when said inf/AP 41d, and snail all" yielding sill? an {lie (km in siili M'H'li l0. An 11 iirzirsi lazy-rungs null 21 suppoi-ln "l mu laz htoiig v tensimi and l'bl'lllfiil u link having a sliding 7 lazy-tongs, win-telly tongs may swing (may l'miii 11. In a device 0'? r support, an exlicnailllie by, by, a, clamp carried ly id bracket and adapted to engage a {U1} .2 lieivpliurie supx. a port, and an i mm-ally (3H0; (ling linger can ried by said clamp. iiiifll'llifii to un' nga lie Heath the lmul mi m d l ciflpilflll SH i2. in :i. device m? lllli :i'lM S :lemrmml, a suppmfi, an e f a li i wuiii'ml in said support and Mill Ti in be amended and m ni/racked in [)lllh) 27 1 right {in 41 5 i0 52ml angle, and humus in? "Him; i'ei Ming {he dmvm 12rd muwiiiein: (if mil} bracket,

Signed by im; at 'igw Illinois, iliis: 29 day (if April UH? PEFITHR U. BPRNS "IF/55GB:

} A. Swmzmmm,

1.. Guam. 

